Imaginary Picture of HAT-P-38 b

Display orbital revolution of HAT-P-38 b around the hoststar HAT-P-38
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Exoplanet Name : HAT-P-38 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.8250 (Rjup) 9.2474 (Rearth)
Mass (Mjup / Me): 0.2670 (Mjup) 84.8894 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0523 (AU) 0.0523 (AU Est.)
Eccentricity : 0.0670
Orbital Period(Yrs) 0.0127
Orbital Period(Observed/Estimated) 4.64 (Days Obs.) 4.64 (Days Est.)
Surface Gravity (G Earth) 0.9927
Star Radiation at Atmospheric Boundary: 308257.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1051.6 (K)
Blackbody T 0.3(K) 987.6 (K)
Blackbody T 0.7(K) 799.1 (K)
Tidally Locked Blackbody T 0.1(K) 1250.6 (K)
Tidally Locked Blackbody T 0.3(K) 1174.5 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HAT-P-38
Alternate Name : "GSC 02314-00559, 2MASS J02213197+3214461"
Star Distance(LY) : 812.1
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 10.1 (GY)
Temperature : 5330 (K)
Spectral type : G
UV portion[%]: 6.0
Visible portion[%]: 41.8
IR portion[%]: 52.2
Metalicity : 0.1
Absolute Magnitude: 5.6
Apparent Magnitude: 12.6
Right Ascension(RA) 35.3830
Declination (DEC) 32.2463
Hubble Space Telescope Guide Star Catalog (GSC) ID 02314-00559
Discovered by
Discovery Paper - Authors "Morgan D. J. Hollis , Sreekumar T. Balan, Greg Lever et al"
Discovery Paper - Title A Uniformly Derived Catalogue of Exoplanets from Radial Velocities
Discovery Paper - Journal "The Astrophysical Journal,olume 750,umber 2"
Discovery Paper - URL http://iopscience.iop.org/article/10.1088/0004-637X/750/2/113/meta
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HAT-P-38+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HAT-P-38%20b/
HAT-P-38 b
HAT-P-38 b

  • HAT-P-38 b is an exoplanet orbiting the star HAT-P-38, located about 812.1 light-years (249.0 pc) away from Solar System. Its discovery was publicly announced on 2012.
  • The host star HAT-P-38 has apparent magnitude of 12.6, with absolute magnitude of 5.6.
  • It is 0.9 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5330 with its spectral types of G
  • In this planetary system, the extrasolar planet HAT-P-38 b orbits around the star HAT-P-38 every 4.6 days with its orbital distance of 0.05 AU ( 7823968.6 km)
  • (Projected orbit of HAT-P-38 b around its host star HAT-P-38)


  • The Star HAT-P-38 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.568 AU ( 84979511.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.785 AU ( 117463893.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.196 AU ( 178988978.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.761 AU ( 263390122.6 km)
  • Radiation at Planetary Boundary of HAT-P-38 b : 308257.51 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HAT-P-38)



  • Kopparapu Recent Venus for Star HAT-P-38 distance : 0.604 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HAT-P-38 distance : 0.765 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HAT-P-38 distance : 0.739 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HAT-P-38 distance : 0.811 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HAT-P-38 distance : 1.370 AU
  • Kopparapu Outer Boundary for Early Mars for Star HAT-P-38 distance : 1.445 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HAT-P-38)



  • Original Kopparapu Recent Venus for Star HAT-P-38 distance : 0.600 AU
  • Original Kopparapu Runaway Greenhouse for Star HAT-P-38 distance : 0.787 AU
  • Original Kopparapu Moist Greenhouse for Star HAT-P-38 distance : 0.794 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HAT-P-38 distance : 1.393 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HAT-P-38 distance : 1.449 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HAT-P-38)



    (Position in Stellar Map of star HAT-P-38 and its Exoplanet HAT-P-38 b)



    (Zoomed position in Stellar Map of star HAT-P-38 and its Exoplanet HAT-P-38 b (zoom level 3))

    (Synthetic Spectrum of star HAT-P-38*)
    *Yamashiki YA et al. 2019 ApJ 881 114
    MUSCLES Paper I - France et al. 2016 ApJ 820 89
    MUSCLES Paper II- Youngblood et al. 2016 ApJ 824 101
    MUSCLES Paper III- Loyd et al. 2016 ApJ 824 102